I assume KF/BF thought they could protect Petras this season and this year's OL disaster is highlighting Petras shortcomings. If KF/BF have any brains, they wil pick someone else to be the Annointed One next spring and any change is going to be an upgrade in QB mobility. Petras will transfer out,
Or they can keep Petras, next year OL not going to be much better, and the complaints on BF are going to get a lot worse. Offenses finishing in the lower 10 percentile is not a good resume builder for BF. He won't get the IOwa job after KF gone and BF won't even get another offensive coordinator job with these type of puke offenses.
KF definitely doesn't like in season QB controversy but even he will cut bait on a guy that can't get the job done. Petras is not very good QB and he won't be transferring to a P5 school.